Tim,
First thing of note: The antenna is too low. I started right where you
are, and had the exact same problems. I moved it up to 8' and still had SWRs
> 3:1 on several bands. If I tuned for 15m, 17 was shot, etc. I was doing
the same things (cables, matching box, taking things apart, cleaning, etc) to
no avail.
I took the thing down to move to a temporary QTH. Here, I have a deck
about 10 feet off the ground. I lashed the same 8' support pole to the deck
rail and fired up. No SWR problems at all across any band! Don't even need
the rig internal tuner. Now, I realize good SWR has nothing to do with
signals, but with the R7000 and 100 watts from a 1000MP, sitting here in Iowa,
I've gotten through to the H40, FO/M, FO/A, and 3B7 expeditions, so it must be
working.
Hope your fix is as simple as this. Good luck!
73,
Steve
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